How to clean my stainless steel tumbler?

If you’re new to the world of looking after Stainless Steel drinkware, the following instructions on how to clean stainless steel tumblers can not be more hassle-free.

1. Take apart all pieces
 Before washing, you should start by separating the lid from the tumbler so that each part of it can be exposed to water and soap.
2. Use a sponge or a bottle-cleaning brush
 You can use a sponge or bottle brush to reach the narrow interior of the tumbler and scrub every nook clean.
NOTE: DO NOT use a metal brush or steel wool on stainless steel because they can scratch and etch the metal. Those scratches then act as stain magnets, trapping residual coffee and tainting the flavor of any future drinks you put in your tumbler.
3. Scrub with dish soap/detergent
 It's best to use mild dish soap and wash the tumbler pieces in the sink. Make sure to thoroughly rinse!
NOTE: DO NOT use bleach on the tumbler. Your tumbler's chromium oxide is broken down by bleach. Without chromium oxide, stainless steel will rust over time, ruining your tumbler. 
4. Clean the lid
The lid is top-rack dishwasher safe however, hand wash is recommended for the lid. It's easy for bacteria to develop and for dirt to accumulate on tumbler lids. To get the best results, let the lid soak in warm, soapy water for about 10 minutes to remove any residue. After soaking it, give it a good scrub and rinse.
5. Allow your tumbler to dry completely
 When you’re done rinsing, let your tumbler and the lid dry completely. Bacteria will be more prone to grow in a damp tumbler.

NOTE: DO NOT microwave your tumbler. Metal products can prevent waves from entering the metal and, as a result, reflect the waves back at the source: your microwave, causing serious damage to your device.